People tend to get some breeds, including this one, based on the 'cuteness' factor, not thinking about it's purpose, or the training it takes to raise a good working dog. We've seen many Corgis who are happy to bite when things don't go their way, because they were so spoiled and 'cute'...
x2 on all the above! They are cute and short, but determined herding dogs, so need training and gainful employment.
Any puppy needs to learn that your birds are OFF LIMITS, from day one, and lots of supervision. Fun, but work, and if you aren't in charge, your Corgi will take over.
Mary